Double twist twisting spindle



March 8, 193 8. 0, BOCHMANN 2,110,320

DOUBLE TWIST TWISTING SPINDLE Filed May 1, 1936 Patented Mar. 8, 1938PATENT OFFICE 2,110,320 DOUBLE TWIST TWISTING SPINDLE Otto Bochmann,Bemschcid-Lennep, Germany Application May 1, I

1936, Serial No. 71,401 h n Germany May 10, 1935 2 Claims.

This invention relates to inclined double-twist twisting spindles drivenby an endless driving element. Spindles of this type are usuallyarranged on a common spindle rail, so that the 5 -spindles have to beaccurately adjusted singly in order to obtain an almost uniform pressingof the spindles against the driving element. This arrangement suffers ofthe inconvenience that, gesides the complicated arrangement, a

uniform pressure cannot be ensured at all points as the pulled side isalways slack relative to the pulling side.

It has become known for simple vertically arranged twisting spindles toarrange them independently on each other in individual bearing arms so.that in this instance a uniform pressing of the spindles against thedriving element is ensured. This construction has, however, the defect,that owing to the preserving of the common spindle rail and to theaddition of separate bearing pins for every single spindle the machinebecomes complicated and expensive. Every spindle must have an elementwhich presses the spindle against the driving element. This pressingelement consists usually of a spring or of a weight. The machine is notonly more complicated by the arrangement of these pressing elements butis less easy to survey and inclined to disturbances of service as theauxiliary elements producing the pressure are liable to fail.

These inconveniences are obviated by the invention which consists inthat the inclined double-twist twisting spindles driven by an endlessdriving element and oscillatably mounted independently of one another inindividual bearing arms are suspended on a common support so that thewharves bear by gravity of the spindles against the driving element.Brake surfaces are preferably provided against which the individual 40spindles are pressed for stopping their rotation,

and holding devices are also provided for maintaining the spindles indisengaged position and out or contact with the brake surfaces so thatthe spindles can be rotated freely by hand.

This construction presents the advantage that, as in the twistingspindles of known type, a uniform pressing-on pressure is obtained, themanufacturing being simplified and the cost of manufacture reduced. Thespindles are suspended on a common support so loosely that they produceby gravity the pressing-on pressure. All auxiliary elements and aspecial bearing of the spindles are avoided and the machine is ofsimpler construction and more reliable in serv- 55 ice owing to thesimple arrangement of the spindles as the gravity of the spindles isalways at disposal so that the pressing on pressure exists permanently.

/ An embodiment of the invention is illustrated by way of example in theaccompanying drawing in which:- 5

Fig. 1 is a side elevation of the improved spindle.

Fig. 2 is a section on line 2-2 of Fig. 1.

Fig. 3 shows diagrammatically the 'total arrangement of such a drive. 10The double twist twisting spindles l are mounted each one in a bearingarm 2, these arms being loosely suspended on a common support 3 so thatthe spindles bear with the wharves by gravity against the drivingelement 4. Holding 15 devices 5, designed to hold the spindles in thedisengaged position, are arranged one opposite each spindle, a stoppingelement 6 of each holding device engaging in a corresponding recess ofthe spindle. Opposite each spindle a brake sur- 20 face I is arrangeddesigned to stop the corre-, sponding spindle if the same is pulledagainst it, but to liberate the spindle in disengaged position forfurther attendance if the spindle is released. Fig. 3 shows that in anendless belt drive, in which the pulled side is slack or loose relativeto the pulling side, every individual spindle can adapt itself to thesedifferences so that, without any auxiliary means, a general uniformpressingon pressure the spindles is ensured. 30

I claim:-- 1. Inclined double-twist twisting spindles driven by anendless driving element, comprising in combination with the drivingelement and the spindles, a wharve on each spindle, a conmion 35 supportextending in parallel to the driving element, an angulargravity-controlled arm comprising a vertical and a substantiallyhorizontal portion, and mounted to oscillate about the support, and abearing for the corresponding spindle 40 in the substantially horizontalportion.

2. Inclined double twist twisting spindles driven by an endless drivingelement, comprising in combination with the driving element and thespindles, a 'wharve on each spindle, gravitycontrolled oscillatablymounted spindle-bearing means for holding the individual wharves againstthe driving element, a brake surface arranged in. the path ofoscillation of each spindle, said spindle adapted to be swung to bringits wharve into contact with said brake surface to bring said spindle toa standstill, and a holding device adapted to maintain said spindle indisengaged position freely rotatable by hand and out of contact withsaid brake surface.

OTTO BOCHMANN,

